One of 2014’s more under-the-radar digital music trends has been the way DJing apps have been getting more into streaming, courtesy of deals with Spotify in particular. Two of its partner DJ apps – Djay and Pacemaker – made new moves yesterday, but in opposite directions. Djay, developed by Algoriddim, launched a new “Pro” version for Mac computers. Capable of pulling tracks from users’ iTunes libraries or Spotify’s wider catalogue, it’ll sell for $79.99, reflecting Algoriddim’s ambitions to target DJs who’ll actually be playing music out in public, rather than just bedroom amateurs. Pacemaker’s latest announcement is different though: a new feature for its iPad app called Autopilot, which sorts a chosen selection of tracks into what it thinks is a suitable order, automatically mixing them into one another. So it’s an example of a DJ app seguing into almost a personal radio player, again with Spotify as its musical core.